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Medial prefrontal cortex

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https://www.readbyqxmd.com/read/28647675/abstinence-from-prolonged-ethanol-exposure-affects-plasma-corticosterone-glucocorticoid-receptor-signaling-and-stress-related-behaviors
#1
Sucharita S Somkuwar, Leandro F Vendruscolo, McKenzie J Fannon, Brooke E Schmeichel, Tran Bao Nguyen, Jasmin Guevara, Harpreet Sidhu, Candice Contet, Eric P Zorrilla, Chitra D Mandyam
Alcohol dependence is linked to dysregulation of the hypothalamic-pituitary-adrenal axis. Here, we investigated effects of repeated ethanol intoxication-withdrawal cycles (using chronic intermittent ethanol vapor inhalation; CIE) and abstinence from CIE on peak and nadir plasma corticosterone (CORT) levels. Irritability- and anxiety-like behaviors as well as glucocorticoid receptors (GR) in the medial prefrontal cortex (mPFC) were assessed at various intervals (2h-28d) after cessation of CIE. Results show that peak CORT increased during CIE, transiently decreased during early abstinence (1-11d), and returned to pre-abstinence levels during protracted abstinence (17-27d)...
June 12, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28646349/modeling-pain-using-fmri-from-regions-to-biomarkers
#2
REVIEW
Marianne C Reddan, Tor D Wager
Pain is a subjective and complex phenomenon. Its complexity is related to its heterogeneity: multiple component processes, including sensation, affect, and cognition, contribute to pain experience and reporting. These components are likely to be encoded in distributed brain networks that interact to create pain experience and pain-related decision-making. Therefore, to understand pain, we must identify these networks and build models of these interactions that yield testable predictions about pain-related outcomes...
June 23, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28645841/how-do-self-interest-and-other-need-interact-in-the-brain-to-determine-altruistic-behavior
#3
Jie Hu, Yue Li, Yunlu Yin, Philip R Blue, Hongbo Yu, Xiaolin Zhou
Altruistic behavior, i.e., promoting the welfare of others at a cost to oneself, is subserved by the integration of various social, affective, and economic factors represented in extensive brain regions. However, it is unclear how different regions interact to process/integrate information regarding the helper's interest and recipient's need when deciding whether to behave altruistically. Here we combined an interactive game with functional Magnetic Resonance Imaging (fMRI) and transcranial direct current stimulation (tDCS) to characterize the neural network underlying the processing/integration of self-interest and other-need...
June 20, 2017: NeuroImage
https://www.readbyqxmd.com/read/28643948/investigating-the-separate-and-interactive-associations-of-trauma-and-depression-on-brain-structure-implications-for-cognition-and-aging
#4
Aimee J Karstens, Olusola Ajilore, Leah H Rubin, Shaolin Yang, Aifeng Zhang, Alex Leow, Anand Kumar, Melissa Lamar
OBJECTIVE: Trauma and depression are associated with brain structural alterations; their combined effects on these outcomes are unclear. We previously reported a negative effect of trauma, independent of depression, on verbal learning and memory; less is known about underlying structural associates. We investigated separate and interactive associations of trauma and depression on brain structure. METHODS: Adults aged 30-89 (N = 203) evaluated for depression (D+) and trauma history (T+) using structured clinical interviews were divided into 53 D+T+, 42 D+T-, 50 D-T+, and 58 D-T-...
June 23, 2017: International Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28641131/children-s-brain-activation-during-risky-decision-making-a-contributor-to-substance-problems
#5
Thomas J Crowley, Manish S Dalwani, Joseph T Sakai, Kristen M Raymond, Shannon K McWilliams, Marie T Banich, Susan K Mikulich-Gilbertson
OBJECTIVE: Among young children excessive externalizing behaviors often predict adolescent conduct and substance use disorders. Adolescents with those disorders show aberrant brain function when choosing between risky or cautious options. We therefore asked whether similarly aberrant brain function during risky decision-making accompanies excessive externalizing behaviors among children, hypothesizing an association between externalizing severity and regional intensity of brain activation during risky decision-making...
June 4, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28638325/dopamine-noradrenaline-and-differences-in-sexual-behavior-between-roman-high-and-low-avoidance-male-rats-a-microdialysis-study-in-the-medial-prefrontal-cortex
#6
Fabrizio Sanna, Jessica Bratzu, Maria A Piludu, Maria G Corda, Maria R Melis, Osvaldo Giorgi, Antonio Argiolas
Roman High- (RHA) and Low-Avoidance (RLA) outbred rats, which differ for a respectively rapid vs. poor acquisition of the active avoidance response in the shuttle-box, display differences in sexual activity when put in the presence of a sexually receptive female rat. Indeed RHA rats show higher levels of sexual motivation and copulatory performance than RLA rats, which persist also after repeated sexual activity. These differences have been correlated to a higher tone of the mesolimbic dopaminergic system of RHA rats vs...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28634451/berberine-ameliorates-diabetes-associated-cognitive-decline-through-modulation-of-aberrant-inflammation-response-and-insulin-signaling-pathway-in-dm-rats
#7
Qingjie Chen, Ran Mo, Ninghua Wu, Xin Zou, Cai Shi, Jing Gong, Jingbin Li, Ke Fang, Dingkun Wang, Deshen Yang, Kaifu Wang, Juan Chen
Background: Memory-impairment was one of the common characteristics in patients with diabetes mellitus. The release of chronic inflammation mediators and insulin resistance in diabetic brain gave rise to the generation of toxic factor Aβ42 which was the marker of Alzheimer's disease. In addition, the impairment of memory in diabetes mellitus was also correlated predominantly with uptake/metabolism of glucose in medial prefrontal cortex (mPFC). Previously, anti-inflammation and hypoglycemic effects of berberine (BBr) have been described in peripheral tissues...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28633986/gray-matter-abnormalities-in-non-comorbid-medication-naive-patients-with-major-depressive-disorder-or-social-anxiety-disorder
#8
Youjin Zhao, Lizhou Chen, Wenjing Zhang, Yuan Xiao, Chandan Shah, Hongru Zhu, Minlan Yuan, Huaiqiang Sun, Qiang Yue, Zhiyun Jia, Wei Zhang, Weihong Kuang, Qiyong Gong, Su Lui
BACKGROUND: An overlap of clinical symptoms between major depressive disorder (MDD) and social anxiety disorder (SAD) suggests that the two disorders exhibit similar brain mechanisms. However, few studies have directly compared the brain structures of the two disorders. The aim of this study was to assess the gray matter volume (GMV) and cortical thickness alterations between non-comorbid medication-naive MDD patients and SAD patients. METHODS: High-resolution T1-weighted images were acquired from 37 non-comorbid MDD patients, 24 non-comorbid SAD patients and 41 healthy controls (HCs)...
June 15, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28630404/activation-of-d1r-pka-mtor-signaling-cascade-in-medial-prefrontal-cortex-underlying-the-antidepressant-effects-of-l-spd
#9
Bing Zhang, Fei Guo, Yuqin Ma, Yingcai Song, Rong Lin, Fu-Yi Shen, Guo-Zhang Jin, Yang Li, Zhi-Qiang Liu
Major depressive disorder (MDD) is a common neuropsychiatric disorder characterized by diverse symptoms. Although several antidepressants can influence dopamine system in the medial prefrontal cortex (mPFC), but the role of D1R or D2R subtypes of dopamine receptor during anti-depression process is still vague in PFC region. To address this question, we investigate the antidepressant effect of levo-stepholidine (l-SPD), an antipsychotic medication with unique pharmacological profile of D1R agonism and D2R antagonism, and clarified its molecular mechanisms in the mPFC...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28630257/contrasting-effects-of-medial-and-lateral-orbitofrontal-cortex-lesions-on-credit-assignment-and-decision-making-in-humans
#10
MaryAnn P Noonan, Bolton Chau, Matthew Fs Rushworth, Lesley K Fellows
The orbitofrontal cortex is critical for goal-directed behavior. Recent work in macaques has suggested the lateral orbitofrontal cortex (lOFC) is relatively more concerned with assignment of credit for rewards to particular choices during value-guided learning, while the medial orbitofrontal cortex (often referred to as ventromedial prefrontal cortex in humans; vmPFC/mOFC) is involved in constraining the decision to the relevant options. We examined whether people with damage restricted to sub-regions of prefrontal cortex showed the patterns of impairment observed in prior investigations of the effects of lesions to homologous regions in macaques...
June 19, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28630250/amplification-of-mglu5-endocannabinoid-signaling-rescues-behavioral-and-synaptic-deficits-in-a-mouse-model-of-adolescent-and-adult-dietary-polyunsaturated-fatty-acids-imbalance
#11
Antonia Manduca, Anissa Bara, Thomas Larrieu, Olivier Lassalle, Corinne Joffre, Sophie Layé, Olivier J Manzoni
Energy-dense, yet nutritionally-poor food is a high-risk factor for mental health disorders. This is of particular concern during adolescence, a period often associated with increased consumption of low nutritional content food and higher prevalence of mental health disorders. Indeed, there is an urgent need to understand the mechanisms linking unhealthy diet and mental disorders. Deficiency in n-3 polyunsaturated fatty acid (PUFAs) is a hallmark of poor nutrition and mood disorders. Here, we developed a mouse model of n-3 PUFAs deficiency lasting from adolescence into adulthood...
June 19, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28628541/apathy-due-to-injury-of-the-prefrontocaudate-tract-following-mild-traumatic-brain-injury
#12
Sung Ho Jang, Hyeok Gyu Kwon
In this study, we report on a patient who developed apathy resulting from injury to the prefrontocaudate tract following mild traumatic brain injury (TBI), which was observed on diffusion tensor tractography (DTT). A 46-year-old female patient was involved in a bus accident. Her history included intracerebral hemorrhage (ICH) in the left putamen 4 years ago before the head trauma, and her family reported that she had fully recovered. She developed apathy after the TBI, worsening over time. Decreased neural connectivity of the left caudate nucleus (CN) to the left upper medial prefrontal cortex (PFC) resulting from the ICH was observed on the pre-TBI-DTT, whereas on the post-TBI-DTT (28 months after TBI), the neural connectivity of the left CN to the left upper medial PFC was increased, whereas that to the left lower medial PFC and orbitofrontal cortex was decreased...
July 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28627941/detecting-social-cognitive-deficits-after-traumatic-brain-injury-an-ale-meta-analysis-of-fmri-studies
#13
Hui Xiao, Andre Jacobsen, Ziqian Chen, Yang Wang
PURPOSE: Traumatic brain injury (TBI) can result in significant social dysfunction, which is represented by impairment to social-cognitive abilities (i.e. social cognition, social attention/executive function and communication). This study is aimed to explore brain networks mediating the social dysfunction after TBI and its underlying mechanisms. METHODS: We performed a quantitative meta-analysis using the activation likelihood estimation (ALE) approach on functional magnetic resonance imaging (fMRI) studies of social-cognitive abilities following TBI...
June 19, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28626785/blunted-amygdala-functional-connectivity-during-a-stress-task-in-alcohol-dependent-individuals-a-pilot-study
#14
Natasha E Wade, Claudia B Padula, Robert M Anthenelli, Erik Nelson, James Eliassen, Krista M Lisdahl
BACKGROUND: Scant research has been conducted on neural mechanisms underlying stress processing in individuals with alcohol dependence (AD). We examined neural substrates of stress in AD individuals compared with controls using an fMRI task previously shown to induce stress, assessing amygdala functional connectivity to medial prefrontal cortex (mPFC). MATERIALS AND METHODS: For this novel pilot study, 10 abstinent AD individuals and 11 controls completed a modified Trier stress task while undergoing fMRI acquisition...
December 2017: Neurobiology of Stress
https://www.readbyqxmd.com/read/28626018/dissecting-the-function-of-hippocampal-oscillations-in-a-human-anxiety-model
#15
Saurabh Khemka, Gareth Barnes, Raymond J Dolan, Dominik R Bach
Neural oscillations in hippocampus and medial prefrontal cortex (mPFC) are a hallmark of rodent anxiety models that build on conflict between approach and avoidance. Yet, the function of these oscillations, and their expression in humans, remain elusive. Here, we used magnetoencephalography (MEG) to investigate neural oscillations in a task that simulated approach-avoidance conflict, wherein 23 male and female human participants collected monetary tokens under a threat of virtual predation. Probability of threat was learned beforehand by direct experience...
June 16, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28625720/the-cannabinoid-system-and-pain
#16
REVIEW
Stephen G Woodhams, Victoria Chapman, David P Finn, Andrea G Hohmann, Volker Neugebauer
Chronic pain states are highly prevalent and yet poorly controlled by currently available analgesics, representing an enormous clinical, societal, and economic burden. Existing pain medications have significant limitations and adverse effects including tolerance, dependence, gastrointestinal dysfunction, cognitive impairment, and a narrow therapeutic window, making the search for novel analgesics ever more important. In this article, we review the role of an important endogenous pain control system, the endocannabinoid (EC) system, in the sensory, emotional, and cognitive aspects of pain...
June 15, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28625674/regional-cerebral-cortical-thickness-correlates-with-autonomic-outflow
#17
REVIEW
Katelyn N Wood, Mark B Badrov, Mark R Speechley, J Kevin Shoemaker
Dysregulation of autonomic control often develops with advancing age, favoring a chronic state of heightened sympathetic outflow with parasympathetic withdrawal. However, the mechanisms of this age-related autonomic impairment are not known. This study tested the hypothesis that inter-individual differences in autonomic outflow across the adult age-span are related to cerebral cortex thickness. A total of 55 healthy, active individuals participated in this study (21-73years; 18 female). Physical fitness was treated as a possible covariate (VO2peak: 26-81mL/kg/min)...
June 7, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28620339/the-stress-acceleration-hypothesis-of-nightmares
#18
Tore Nielsen
Adverse childhood experiences can deleteriously affect future physical and mental health, increasing risk for many illnesses, including psychiatric problems, sleep disorders, and, according to the present hypothesis, idiopathic nightmares. Much like post-traumatic nightmares, which are triggered by trauma and lead to recurrent emotional dreaming about the trauma, idiopathic nightmares are hypothesized to originate in early adverse experiences that lead in later life to the expression of early memories and emotions in dream content...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28619530/neural-networks-underlying-language-and-social-cognition-during-self-other-processing-in-autism-spectrum-disorders
#19
Rajesh K Kana, Emma B Sartin, Carl Stevens, Hrishikesh D Deshpande, Christopher Klein, Mark R Klinger, Laura Grofer Klinger
The social communication impairments defining autism spectrum disorders (ASD) may be built upon core deficits in perspective-taking, language processing, and self-other representation. Self-referential processing entails the ability to incorporate self-awareness, self-judgment, and self-memory in information processing. Very few studies have examined the neural bases of integrating self-other representation and semantic processing in individuals with ASD. The main objective of this functional MRI study is to examine the role of language and social brain networks in self-other processing in young adults with ASD...
June 12, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28614398/5-aza-2-deoxycytidine-in-the-medial-prefrontal-cortex-regulates-alcohol-related-behavior-and-ntf3-trkc-expression-in-rats
#20
Xiaomeng Qiao, Fangyuan Yin, Yuanyuan Ji, Yunxiao Li, Peng Yan, Jianghua Lai
Recent studies have indicated that DNA methylation plays an important role in the development of alcohol abuse. 5-Aza-2'-deoxycytidine (5-Aza-dc), an inhibitor of DNA methyltransferases, was FDA approved for myelodysplastic syndrome treatment. However, it is unclear whether 5-Aza-dc is involved in alcohol abuse. In this study, using a chronic alcohol exposure model in rats, 5-Aza-dc was injected into the medial prefrontal cortex (mPFC). Alcohol-drinking behavior and the anxiety related behavior were evaluated by two-bottle choice and open field test...
2017: PloS One
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